On Thu, 10 Feb 2022 22:41:41 +0000, Kalesh Singh <kaleshsingh@xxxxxxxxxx> wrote: > > This series is based on v5.17-rc3 and adds the following stack features to > the KVM nVHE hypervisor: > > == Hyp Stack Guard Pages == > > Based on the technique used by arm64 VMAP_STACK to detect overflow. > i.e. the stack is aligned to twice its size which ensure that the > 'stack shift' bit of any valid SP is 0. The 'stack shift' bit can be > tested in the exception entry to detect overflow without corrupting GPRs. Having quickly parsed the code, this seems to only be effective for pKVM and the EL2-allocated stack. Is there any technical reason not to implement this for the much more common case of 'classic' KVM in nVHE mode? Thanks, M. -- Without deviation from the norm, progress is not possible. _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
